OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   6 {9 ^9 a5 @5 `% k# B9 `
2. /*
   ( h7 V1 H9 J7 h
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   & J+ |$ y" b+ c; S8 a. u8 d* n
6. *
   1 r1 M8 O8 r3 e( G4 Q/ u* c
7. *   This file contains EDMA3 Test code.
   
8. *
   , ^# U1 t% K2 _3 f4 I
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    " x8 t" @/ o( u- `' W
12. *
    1 N6 i( q4 g4 z' M7 B$ A4 i2 i
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    & r2 |4 k8 J3 ?3 |
14. *
    
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    ' X4 M5 g. [+ i& l* W
18. *
    - R# I  ?! J' ^; X  r
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    - R5 @  F- {2 v1 z
20. * kind, whether express or implied; without even the implied warranty
    . f8 z4 ?$ `/ _7 j
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    % O- n- Z: X2 \* U2 K$ k9 m
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    & S: w3 i3 f& W$ C
30. #include <asm/io.h>
    2 b0 r; I; K: `% ?' G. M2 m+ g
31. #include <linux/moduleparam.h>
    ' h/ F7 i: B. T+ {/ x
32. #include <linux/sysctl.h>
    9 e9 }! k  z' G, A1 o% k8 X
33. #include <linux/mm.h>
    3 Q  o4 S/ c) H5 i( Q/ ]9 _
34. #include <linux/dma-mapping.h>
    ; I9 J, H5 o" r9 f6 f0 M
35. 
    , c# D: ?* z- x( ]  A+ D1 V
36. #include <mach/memory.h>
    2 v+ c" y1 @, L4 q" g
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    0 D7 \* r- A1 r8 ], k- @8 K: N
39. #include <asm/hardware/edma.h>
    ' C1 y5 j$ @. L/ e4 x/ T) S7 k9 q
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    5 f* l0 g' l# y$ H5 S
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    ) r) [2 G. ^, _1 y, o! a. r
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    1 {5 A8 n- ]% M- W. L' ^
52. #endif
    4 k* F# M. h1 J, n6 q
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    - b, L- k% n, {7 d) \9 t
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    1 L7 f& i* J& z7 l( E& a  w0 _8 r
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    + L1 m- y/ I' c: f3 D
59. #define ITCCHEN_SHIFT               23
    $ \9 H: P; |3 X4 j6 q
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    . {: h' S% `0 `/ x
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 G+ y! x  c0 h$ J& e$ }
67. 
    2 i% q/ b0 `7 n& d1 J
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    : m9 h) d* U4 q" Z$ U' H# N
72. 
    5 u% ~0 ]+ S' Q  F  W7 s
73. char *dmabufsrc1 = NULL;
    4 m% [" G1 D/ h# P. o- s; A
74. char *dmabufsrc2 = NULL;
    , K  s! O6 o# {0 E
75. char *dmabufdest1 = NULL;
    / H- G8 {$ u1 _  R
76. char *dmabufdest2 = NULL;
    ' c% e7 G4 L1 Q7 V" P7 W
77. 
    
78. static int acnt = 512;
    9 \# E& c# }% @9 x
79. static int bcnt = 8;
    * V' _  ~$ q6 v" t
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    : ^) c* D1 C& `2 C
84. module_param(ccnt, int, S_IRUGO);

复制代码

      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
arm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。